Originally Posted by GhanBuriGhan
It's not about content though. In these open shooters I sometimes hang out in a hiding place for minutes, trying to assess the situation, watching guards, trying to decide on my aproach. Stuff like that can easily inflate your playtime by a factor of 2 or 3.

Yes, this happens to me in games of this nature as well. In the few games out there that have solid stealth mechanics, I tend to really enjoy spending a lot of time planning my approach, hoping to avoid ever being detected. Sometimes I'll take the non-lethal, non-confrontational route and avoid all contact with guards, other times I'll disable guards in a silent "assassin" way, etc. Playing a game in this manner - especially if you reload when you screw up a stealth approach and try again instead of quickly shooting your way out of trouble - can certainly take a while and add a lot of playtime.